What is a Struct?

Up until now, you've worked with C's built-in data types like int, float, and char. But what if you need to group related information together? This is where structures, or structs, become invaluable.

A struct is a user-defined data type that allows you to combine multiple variables of different types under a single name. Think of it as a container that holds related pieces of information together.

Consider a student record system. Instead of managing separate variables for each piece of student information, you can group them together:

// Instead of separate variables:
char student_name[50];
int student_id;
float student_grade;

// You can group them in a struct:
struct Student {
    char name[50];
    int id;
    float grade;
};

This approach makes your code more organized and easier to understand. When you see a struct Student, you immediately know it contains all the essential information about a student. Structures are fundamental building blocks that help you model real-world entities in your programs, making your code more logical and maintainable.